<template>
	<!-- #ifdef APP-NVUE -->
	<cell :keep-scroll-position="keepScrollPosition">
		<!-- #endif -->
		<view :class="{ 'uv-list-item--disabled': disabled }"
			:style="[$uv.addStyle(customStyle), { 'background-color': customStyle.backgroundColor ? customStyle.backgroundColor : '#fff' }]"
			:hover-class="(!clickable && !link) || disabled || showSwitch ? '' : 'uv-list-item--hover'" class="uv-list-item"
			@click="onClick">
			<view v-if="!isFirstChild" class="border--left" :class="{ 'uv-list--border': border }"></view>
			<view class="uv-list-item__wrapper">
				<slot>
					<view class="uv-list-item__container"
						:class="{ 'container--right': showArrow || link, 'flex--direction': directionData === 'column' }"
						:style="{ paddingTop: padding.top, paddingLeft: padding.left, paddingRight: padding.right, paddingBottom: padding.bottom }">
						<slot name="header">
							<view class="uv-list-item__header">
								<view v-if="thumb" class="uv-list-item__icon">
									<image :src="thumb" class="uv-list-item__icon-img" :class="['uv-list--' + thumbSize]" />
								</view>
								<view v-else-if="showExtraIcon" class="uv-list-item__icon">
									<uv-icon :name="extraIcon.icon" :customPrefix="extraIcon.customPrefix" :color="extraIcon.color"
										:size="extraIcon.size" />
								</view>
							</view>
						</slot>
						<slot name="body">
							<view class="uv-list-item__content"
								:class="{ 'uv-list-item__content--center': thumb || showExtraIcon || showBadge || showSwitch }">
								<text v-if="title" class="uv-list-item__content-title" :class="[ellipsis && `uv-line-${ellipsis}`]">{{
									title }}</text>
								<text v-if="note" class="uv-list-item__content-note">{{ note }}</text>
							</view>
						</slot>
						<slot name="footer">
							<view v-if="rightText || showBadge || showSwitch" class="uv-list-item__extra"
								:class="{ 'flex--justify': directionData === 'column' }">
								<text v-if="rightText" class="uv-list-item__extra-text">{{ rightText }}</text>
								<uv-badge v-if="showBadge" :show="!!(badge.show || badge.isDot || badge.value)" :isDot="badge.isDot"
									:value="badge.value" :max="badge.max" :type="badge.type" :showZero="badge.showZero"
									:bgColor="badge.bgColor" :color="badge.color" :shape="badge.shape" :numberType="badge.numberType"
									:inverted="badge.inverted" customStyle="margin-left: 4px;"></uv-badge>
								<uv-switch v-if="showSwitch" :value="switchChecked" :disabled="disabled"
									@change="onSwitchChange"></uv-switch>
							</view>
						</slot>
					</view>
				</slot>
			</view>
			<uv-icon v-if="showArrow || link" size="34rpx" class="uv-icon-wrapper" color="#bbb" name="arrow-right" />
		</view>
		<!-- #ifdef APP-NVUE -->
	</cell>
	<!-- #endif -->
</template>

<script>
import mpMixin from '@/uni_modules/uv-ui-tools/libs/mixin/mpMixin.js'
import mixin from '@/uni_modules/uv-ui-tools/libs/mixin/mixin.js'
/**
 * ListItem 列表子组件
 * @description 列表子组件
 * @tutorial https://ext.dcloud.net.cn/plugin?id=24
 * @property {String} 	title 							标题
 * @property {String} 	note 							描述
 * @property {String} 	thumb 							左侧缩略图，若thumb有值，则不会显示扩展图标
 * @property {String}  	thumbSize = [lg|base|sm]		略缩图大小
 * 	@value 	 lg			大图
 * 	@value 	 base		一般
 * 	@value 	 sm			小图
 * @property {String} 	rightText 						右侧文字内容
 * @property {Boolean} 	disabled = [true|false]			是否禁用
 * @property {Boolean} 	clickable = [true|false] 		是否开启点击反馈
 * @property {String} 	link = [navigateTo|redirectTo|reLaunch|switchTab] 是否展示右侧箭头并开启点击反馈
 *  @value 	navigateTo 	同 uni.navigateTo()
 * 	@value redirectTo 	同 uni.redirectTo()
 * 	@value reLaunch   	同 uni.reLaunch()
 * 	@value switchTab  	同 uni.switchTab()
 * @property {String | PageURIString} 	to  			跳转目标页面
 * @property {Boolean} 	showBadge = [true|false] 		是否显示数字角标
 * @property {Object} 	badge  扩展数字角标的参数，格式为 :badge="{value: 122}"
 * @property {Boolean} 	showSwitch = [true|false] 		是否显示Switch
 * @property {Boolean} 	switchChecked = [true|false] 	Switch是否被选中
 * @property {Boolean} 	showExtraIcon = [true|false] 	左侧是否显示扩展图标
 * @property {Object} 	extraIcon 						扩展图标参数，格式为 :extraIcon="{icon: 'photo',size: '30px'}"
 * @property {String} 	direction = [row|column]		排版方向
 * @value row 			水平排列
 * @value column 		垂直排列
 * @event {Function} 	click 							点击 uniListItem 触发事件
 * @event {Function} 	switchChange 					点击切换 Switch 时触发
 */
export default {
	name: 'uv-list-item',
	mixins: [mpMixin, mixin],
	emits: ['click', 'switchChange'],
	props: {
		direction: {
			type: String,
			default: 'row'
		},
		title: {
			type: String,
			default: ''
		},
		note: {
			type: String,
			default: ''
		},
		ellipsis: {
			type: [Number, String],
			default: 0
		},
		disabled: {
			type: [Boolean, String],
			default: false
		},
		clickable: {
			type: Boolean,
			default: false
		},
		showArrow: {
			type: [Boolean, String],
			default: false
		},
		link: {
			type: [Boolean, String],
			default: false
		},
		to: {
			type: String,
			default: ''
		},
		showSwitch: {
			type: [Boolean, String],
			default: false
		},
		switchChecked: {
			type: [Boolean, String],
			default: false
		},
		showBadge: {
			type: [Boolean, String],
			default: false
		},
		badge: {
			type: Object,
			default() {
				return {}
			}
		},
		rightText: {
			type: String,
			default: ''
		},
		thumb: {
			type: String,
			default: ''
		},
		thumbSize: {
			type: String,
			default: 'base'
		},
		showExtraIcon: {
			type: [Boolean, String],
			default: false
		},
		extraIcon: {
			type: Object,
			default() {
				return {
					name: '',
					color: '#000000',
					size: 20,
					customPrefix: ''
				};
			}
		},
		border: {
			type: Boolean,
			default: false
		},
		customStyle: {
			type: Object,
			default() {
				return {
					padding: '',
					backgroundColor: '#FFFFFF'
				}
			}
		},
		keepScrollPosition: {
			type: Boolean,
			default: false
		}
	},
	computed: {
		directionData() {
			return this.direction ? this.direction : (this.parentData.direction ? this.parentData.direction : 'row');
		}
	},
	watch: {
		'customStyle.padding': {
			handler(padding) {
				if (padding) this.setPadding(padding);
			},
			immediate: true
		}
	},
	data() {
		return {
			isFirstChild: false,
			padding: {
				top: "",
				right: "",
				bottom: "",
				left: ""
			},
			parentData: {
				direction: 'row',
				padding: 0
			}
		};
	},
	created() {
		this.updateParentData();
	},
	mounted() {
		this.init();
		this.list = this.getForm()
		// 判断是否存在 uv-list 组件
		if (this.list) {
			if (!this.list.firstChildAppend) {
				this.list.firstChildAppend = true;
				this.isFirstChild = true;
			}
		}
	},
	methods: {
		init() {
			if (!this.parent) {
				this.$uv.error('uv-list-item必须搭配uv-list组件使用');
			}
			this.$nextTick(() => {
				if (!(this.padding.top || this.padding.right || this.padding.bottom || this.padding.left)) {
					this.setPadding(this.parentData.padding);
				}
			})
		},
		updateParentData() {
			this.getParentData('uv-list');
		},
		setPadding(padding) {
			if (typeof padding == 'number') {
				padding += ''
			}
			let paddingArr = padding.split(' ')
			if (paddingArr.length === 1) {
				const allPadding = paddingArr[0]
				this.padding = {
					"top": allPadding,
					"right": allPadding,
					"bottom": allPadding,
					"left": allPadding
				}
			} else if (paddingArr.length === 2) {
				const [verticalPadding, horizontalPadding] = paddingArr;
				this.padding = {
					"top": verticalPadding,
					"right": horizontalPadding,
					"bottom": verticalPadding,
					"left": horizontalPadding
				}
			} else if (paddingArr.length === 4) {
				const [topPadding, rightPadding, bottomPadding, leftPadding] = paddingArr;
				this.padding = {
					"top": topPadding,
					"right": rightPadding,
					"bottom": bottomPadding,
					"left": leftPadding
				}
			}
		},
		/**
		 * 获取父元素实例
		 */
		getForm(name = 'uniList') {
			let parent = this.$parent;
			let parentName = parent.$options.name;
			while (parentName !== name) {
				parent = parent.$parent;
				if (!parent) return false
				parentName = parent.$options.name;
			}
			return parent;
		},
		onClick() {
			if (this.to !== '') {
				this.openPage();
				return;
			}
			if (this.clickable || this.link) {
				this.$emit('click', {
					data: {}
				});
			}
		},
		onSwitchChange(e) {
			this.$emit('switchChange', e);
		},
		openPage() {
			if (['navigateTo', 'redirectTo', 'reLaunch', 'switchTab'].indexOf(this.link) !== -1) {
				this.pageApi(this.link);
			} else {
				this.pageApi('navigateTo');
			}
		},
		pageApi(api) {
			let callback = {
				url: this.to,
				success: res => {
					this.$emit('click', {
						data: res
					});
				},
				fail: err => {
					this.$emit('click', {
						data: err
					});
				}
			}
			switch (api) {
				case 'navigateTo':
					uni.navigateTo(callback)
					break
				case 'redirectTo':
					uni.redirectTo(callback)
					break
				case 'reLaunch':
					uni.reLaunch(callback)
					break
				case 'switchTab':
					uni.switchTab(callback)
					break
				default:
					uni.navigateTo(callback)
			}
		}
	}
};
</script>

<style lang="scss" scoped>
$show-lines: 1;
@import '@/uni_modules/uv-ui-tools/libs/css/variable.scss';
@import '@/uni_modules/uv-ui-tools/libs/css/components.scss';
$uv-font-size-sm: 28rpx;
$uv-font-size-base: 28rpx;
$uv-font-size-lg: 28rpx;
$uv-spacing-col-lg: 28rpx;
$uv-spacing-row-lg: 30rpx;
$uv-img-size-sm: 20px;
$uv-img-size-base: 26px;
$uv-img-size-lg: 40px;
$uv-border-color: #e5e5e5;
$uv-bg-color-hover: #f1f1f1;
$uv-text-color-grey: #999;
$list-item-pd: $uv-spacing-col-lg $uv-spacing-row-lg;

.uv-list-item {
	@include flex(row);
	font-size: $uv-font-size-lg;
	position: relative;
	justify-content: space-between;
	align-items: center;
	background-color: #fff;
	/* #ifdef H5 */
	cursor: pointer;
	/* #endif */
}

.uv-list-item--disabled {
	opacity: 0.3;
}

.uv-list-item--hover {
	background-color: $uv-bg-color-hover !important;
}

.uv-list-item__wrapper {
	@include flex(column);
	flex: 1;
}

.uv-list-item__container {
	position: relative;
	@include flex(row);
	padding: $list-item-pd;
	padding-left: $uv-spacing-row-lg;
	flex: 1;
	overflow: hidden;
}

.container--right {
	padding-right: 0;
}

.uv-list--border {
	position: absolute;
	top: 0;
	right: 0;
	left: 0;
	/* #ifdef APP-NVUE */
	border-top-color: $uv-border-color;
	border-top-style: solid;
	border-top-width: 0.5px;
	/* #endif */
}

/* #ifndef APP-NVUE */
.uv-list--border:after {
	position: absolute;
	top: 0;
	right: 0;
	left: 0;
	height: 1px;
	content: '';
	-webkit-transform: scaleY(0.5);
	transform: scaleY(0.5);
	background-color: $uv-border-color;
}

/* #endif */
.uv-list-item__content {
	@include flex(column);
	padding-right: 8px;
	flex: 1;
	color: #3b4144;
	justify-content: space-between;
	overflow: hidden;
}

.uv-list-item__content--center {
	justify-content: center;
}

.uv-list-item__content-title {
	font-size: $uv-font-size-base;
	color: #3b4144;
	overflow: hidden;
}

.uv-list-item__content-note {
	margin-top: 6rpx;
	color: $uv-text-color-grey;
	font-size: $uv-font-size-sm;
	overflow: hidden;
}

.uv-list-item__extra {
	@include flex(row);
	justify-content: flex-end;
	align-items: center;
}

.uv-list-item__header {
	@include flex(row);
	align-items: center;
}

.uv-list-item__icon {
	margin-right: 18rpx;
	flex-direction: row;
	justify-content: center;
	align-items: center;
}

.uv-list-item__icon-img {
	/* #ifndef APP-NVUE */
	display: block;
	/* #endif */
	height: $uv-img-size-base;
	width: $uv-img-size-base;
	margin-right: 10px;
}

.uv-icon-wrapper {
	/* #ifndef APP-NVUE */
	display: flex;
	/* #endif */
	align-items: center;
	padding: 0 10px;
}

.flex--direction {
	flex-direction: column;
	/* #ifndef APP-NVUE */
	align-items: initial;
	/* #endif */
}

.flex--justify {
	/* #ifndef APP-NVUE */
	justify-content: initial;
	/* #endif */
}

.uv-list--lg {
	height: $uv-img-size-lg;
	width: $uv-img-size-lg;
}

.uv-list--base {
	height: $uv-img-size-base;
	width: $uv-img-size-base;
}

.uv-list--sm {
	height: $uv-img-size-sm;
	width: $uv-img-size-sm;
}

.uv-list-item__extra-text {
	color: $uv-text-color-grey;
	font-size: $uv-font-size-sm;
}
</style>